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Finding the Fourth Proportional to 78,432.90, 108,237.54 and 42,623.34

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Solution

The fourth proportional to 78,432.90, 108,237.54 and 42,623.34 is: 58,820.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.90 : 108,237.54 = 42,623.34 : x
  2. Step 2: Convert to fraction form
    78,432.90/108,237.54 = 42,623.34/x
  3. Step 3: Cross multiply
    78,432.90x = 108,237.54 × 42,623.34
  4. Step 4: Simplify right side
    78,432.90x = 4,613,445,468.18
  5. Step 5: Solve for x
    x = 4,613,445,468.18/78,432.90
  6. Step 6: Final answer
    x = 58,820.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.